SEMICONDUCTOR-LASER ARRAY DYNAMICS - NUMERICAL SIMULATIONS ON MULTISTRIPE INDEX-GUIDED LASERS
SEMICONDUCTOR-LASER ARRAY DYNAMICS - NUMERICAL SIMULATIONS ON MULTISTRIPE INDEX-GUIDED LASERS
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DOI：
10.1364/josab.10.000496
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发表时间：
1993-03-01
影响因子：
1.9
通讯作者：
MOLONEY, JV
中科院分区：
文献类型：
--
作者：
ADACHIHARA, H;HESS, O;MOLONEY, JV
通过使用通常现象学激光模型的扩展来研究多条带折射率引导半导体激光器阵列的时空动态行为，包括反向传播光场的横向衍射和受激载流子的横向扩散。我们的结果证实，倏逝耦合多带激光器是空间扩展非线性系统中时空复杂性的令人着迷的表现。激光输出的稳定性可以通过用弱外部注入信号注入锁定阵列来实现，并且我们表明外部驱动阵列的稳定性取决于注入信号的横向轮廓。提出了一种数值算法，利用高性能并行计算架构来求解描述激光器结构中光与物质相互作用的耦合偏微分方程。该模型和数值算法都足够灵活和模块化，可以支持任意激光几何形状，并允许在未来的研究中纳入重要的多体半导体效应。
The space-time dynamical behavior of multistripe index-guided semiconductor laser arrays is studied by using an extension of the usual phenomenological laser model to include transverse diffraction of the counterpropagating optical fields and transverse diffusion of the excited carriers. Our results confirm that evanescently coupled multistripe lasers are a fascinating manifestation of spatiotemporal complexity in spatially extended nonlinear systems. Stabilization of the laser output can be achieved by injection locking the array with a weak external injected signal, and we show that the stability of the externally driven array depends on the transverse profile of the injected signal. A numerical algorithm is presented that takes advantage of high-performance parallel computing architectures to solve the coupled partial differential equations describing the light-matter interaction in the laser structure. Both the model and the numerical algorithm are sufficiently flexible and modular to support arbitrary laser geometries and to allow for inclusion of important many-body semiconductor effects in future studies.